True i always hear people having negative energy about it because it’s a 4cylinder but they really don’t realise how powerful & strong these things are. Forged motor from factoryS-Class (W223) Post in thread 'Mercedes-Benz S-Class (W223) Facelift'
In a German Mercedes Benz Forum the owner lately sold a C63SE with 130k miles, he drove the car almost all the time full throttle on the German autobahn, apart from a failed battery because of production error at the beginning , nothing has failed.
The M139 is obviously surprisingly reliable.
The M139 obviously way stronger than expected.
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